Year	Index
1980	7.495
1981	8.365
1982	10.094
1983	11.244
1984	12.4
1985	14.013
1986	14.368
1987	15.61
1988	17.524
1989	19.94
1990	23.486
1991	28.203
1992	35.912
1993	52.424
1994	67.53
1995	68.579
1996	74.658
1997	83.689
1998	88.386
1999	92.79
2000	100
2001	105.824
2002	108.106
2003	114.574
2004	124.176
2005	133.89
2006	141.978
2007	148.033
2008	170.388
2009	188.367
2010	196.484
2011	224.036
2012	245.046
2013	259.056
2014	276.874
2015	295.099
2016	313.742
2017	338.794
2018	354.683
2019	370.303
2020	388.818
2021	408.259
2022	428.672
2023	450.106
2024	472.611